@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/inter-cyrillic-ext-wght-normal-BOeWTOD4.woff2) format("woff2-variations");unicode-range:U+0460-052F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/inter-cyrillic-wght-normal-DqGufNeO.woff2) format("woff2-variations");unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/inter-greek-ext-wght-normal-DlzME5K_.woff2) format("woff2-variations");unicode-range:U+1F00-1FFF}@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/inter-greek-wght-normal-CkhJZR-_.woff2) format("woff2-variations");unicode-range:U+0370-0377,U+037A-037F,U+0384-038A,U+038C,U+038E-03A1,U+03A3-03FF}@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/inter-vietnamese-wght-normal-CBcvBZtf.woff2) format("woff2-variations");unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/inter-latin-ext-wght-normal-DO1Apj_S.woff2) format("woff2-variations");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/inter-latin-wght-normal-Dx4kXJAl.woff2) format("woff2-variations");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}:root{color:#1f1f1f;font-family:Inter Variable,Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-synthesis:none;text-rendering:optimizeLegibility;--accent: #346fc5;--border: #e8e8e8;--muted: #676767;--sidebar-width: 320px;--header-height: 65px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-width:320px;min-height:100vh;background:#fff;-webkit-font-smoothing:antialiased}body.drawer-open{overflow:hidden}button,input{font:inherit}a{color:inherit}button:focus-visible,a:focus-visible,input:focus-visible{outline:2px solid var(--accent);outline-offset:3px}.site-shell{min-height:100vh}.site-header{align-items:center;background:#fffffff5;border-bottom:1px solid var(--border);display:flex;height:var(--header-height);inset:0 0 auto;justify-content:space-between;padding:0 32px;position:fixed;z-index:20}.brand{align-items:center;display:inline-flex;font-size:19px;font-weight:720;gap:12px;text-decoration:none;white-space:nowrap}.brand img{border-radius:7px;height:34px;width:34px}.brand--compact{font-size:15px;gap:9px}.brand--compact img{border-radius:5px;height:28px;width:28px}.header-search{margin-left:auto;width:224px}.search{align-items:center;background:#fff;border:1px solid #dadde2;border-radius:10px;box-shadow:0 1px 2px #0000000a;color:#686b70;display:flex;gap:8px;height:42px;padding:0 10px;position:relative;width:100%}.search input{border:0;color:#252525;flex:1;font-size:14px;min-width:0;outline:0}.search input::placeholder{color:#85878b}.search-shortcut{border:1px solid #e3e4e6;border-radius:5px;color:#909297;font-size:11px;padding:2px 5px}.search-results{background:#fff;border:1px solid #e1e2e4;border-radius:10px;box-shadow:0 12px 30px #0000001f;inset:calc(100% + 8px) 0 auto auto;max-height:min(430px,65vh);overflow:auto;padding:6px;position:absolute;width:360px;z-index:50}.search-results a{border-radius:7px;display:flex;flex-direction:column;gap:4px;padding:10px;text-decoration:none}.search-results a:hover{background:#f5f7fa}.search-results strong{color:#252525;font-size:14px}.search-results span,.search-results p{color:#6f7277;font-size:12px;line-height:1.45;margin:0}.book-sidebar{bottom:0;display:flex;flex-direction:column;left:0;padding:34px 20px 20px 32px;position:fixed;top:var(--header-height);width:var(--sidebar-width)}.book-sidebar nav{display:grid;gap:4px}.chapter-link{border-radius:6px;color:#636363;display:block;font-size:14px;line-height:1.3;padding:8px 0;text-decoration:none}.chapter-link:hover{color:#202020}.chapter-link--active{color:var(--accent);font-weight:650}.author-card{align-items:center;border:1px solid var(--border);border-radius:10px;color:#64676c;display:flex;font-size:12px;gap:7px;margin-top:auto;padding:10px 13px;text-decoration:none}.author-card>img{border-radius:4px;height:23px;width:23px}.book-main{margin-left:var(--sidebar-width);min-height:100vh;padding:calc(var(--header-height) + 31px) 48px 48px}.chapter{display:flex;flex-direction:column;margin:0;max-width:768px;min-height:calc(100vh - var(--header-height) - 68px);position:relative}.chapter-actions{display:flex;justify-content:flex-end;margin-bottom:-31px;position:relative;z-index:2}.copy-button,.more-button{align-items:center;background:#fff;border:1px solid #dbdcde;color:#66696d;cursor:pointer;display:inline-flex;font-size:14px;height:32px;justify-content:center}.copy-button{border-radius:8px 0 0 8px;gap:5px;padding:0 8px}.more-button{border-left:0;border-radius:0 8px 8px 0;padding:0 7px}.more-menu{position:relative}.more-popover{background:#fff;border:1px solid #e0e1e3;border-radius:9px;box-shadow:0 12px 30px #0000001f;display:grid;padding:6px;position:absolute;right:0;top:39px;width:160px}.more-popover a,.more-popover button{background:transparent;border:0;border-radius:6px;color:#383a3d;cursor:pointer;font-size:13px;padding:9px;text-align:left;text-decoration:none}.more-popover a:hover,.more-popover button:hover{background:#f5f6f7}.markdown h1{font-size:clamp(34px,4vw,40px);letter-spacing:-.035em;line-height:1.15;margin:0 150px 22px 0}.markdown h2{font-size:27px;letter-spacing:-.025em;line-height:1.25;margin:42px 0 17px;scroll-margin-top:calc(var(--header-height) + 24px)}.markdown h3{font-size:20px;line-height:1.35;margin:33px 0 14px;scroll-margin-top:calc(var(--header-height) + 24px)}.markdown h4{font-size:17px;line-height:1.4;margin:28px 0 12px}.markdown p,.markdown li{font-size:16px;line-height:1.58}.markdown p{margin:0 0 20px}.markdown ul,.markdown ol{margin:0 0 22px;padding-left:28px}.markdown li{margin:7px 0;padding-left:4px}.markdown a{color:var(--accent);text-decoration:underline;text-decoration-color:#346fc559;text-underline-offset:3px}.markdown strong{font-weight:700}.markdown img{border:1px solid #ececec;border-radius:9px;display:block;height:auto;margin:24px auto 10px;max-width:100%}.page-pagination{display:grid;gap:14px;grid-template-columns:1fr 1fr;margin-top:auto;padding-top:72px}.page-pagination a{align-items:center;border:1px solid #e2e3e5;border-radius:7px;display:flex;gap:10px;justify-content:flex-start;min-height:72px;padding:13px 15px;text-decoration:none}.page-pagination a:hover{border-color:#c9ccd0}.page-pagination span{display:flex;flex-direction:column;gap:4px}.page-pagination small{color:#73767b;font-size:12px}.page-pagination__next{justify-content:flex-end!important;text-align:right}.page-pagination--single{grid-template-columns:1fr}.last-updated{color:#777a7f;font-size:13px;margin:25px 0 0}.toc{bottom:0;overflow-y:auto;padding:35px 28px 30px 12px;position:fixed;right:0;top:var(--header-height);width:228px}.toc p{color:#66696d;font-size:11px;font-weight:700;letter-spacing:.04em;margin:0 0 12px}.toc nav{border-left:1px solid #e3e4e6;display:grid;gap:4px;padding-left:14px}.toc a{color:#6b6d72;font-size:13px;line-height:1.35;padding:5px 0;text-decoration:none}.toc a:hover{color:var(--accent)}.icon-button{align-items:center;background:#fff;border:1px solid #dedfe2;border-radius:9px;color:#4f5256;cursor:pointer;display:inline-flex;height:40px;justify-content:center;padding:0;width:40px}.mobile-only,.mobile-search-panel,.drawer-layer{display:none}@media(min-width:1180px){.book-main--with-toc{padding-right:248px}}@media(max-width:1179px){.desktop-wide-only{display:none}}@media(max-width:760px){:root{--header-height: 65px}.desktop-only{display:none}.mobile-only{display:inline-flex}.site-header{justify-content:flex-start;padding:0 16px}.site-header .brand{font-size:16px;gap:10px;margin-left:16px}.site-header .brand img{height:34px;width:34px}.site-header>.icon-button:first-child{border:0;width:28px}.site-header>.icon-button:last-child{margin-left:auto}.mobile-search-panel{background:#fff;border-bottom:1px solid var(--border);display:block;left:0;padding:10px 16px;position:fixed;right:0;top:var(--header-height);z-index:19}.search--mobile{height:44px}.search--mobile .search-results{left:-1px;right:-1px;width:auto}.book-main{margin-left:0;padding:calc(var(--header-height) + 20px) 16px 34px}.chapter{margin:0 auto;max-width:620px}.chapter-actions{margin:0 0 8px}.markdown h1{font-size:30px;line-height:1.18;margin:0 0 25px}.markdown h2{font-size:25px;margin-top:39px}.markdown h3{font-size:20px}.markdown p,.markdown li{font-size:16px;line-height:1.6}.markdown p{margin-bottom:21px}.page-pagination{gap:10px;grid-template-columns:1fr;margin-top:55px;padding-top:0}.page-pagination>span:empty{display:none}.drawer-layer{display:block;top:0;right:0;bottom:0;left:0;position:fixed;z-index:100}.drawer-backdrop{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background:#16181b2e;border:0;top:0;right:0;bottom:0;left:0;padding:0;position:absolute;width:100%}.mobile-drawer{background:#fff;bottom:0;box-shadow:12px 0 32px #0000001f;display:flex;flex-direction:column;left:0;max-width:82vw;padding:16px 18px 22px;position:absolute;top:0;width:310px}.drawer-header{align-items:center;display:flex;justify-content:space-between;margin-bottom:20px;padding-left:12px}.drawer-close{height:36px;left:min(calc(82vw + 16px),326px);position:absolute;top:16px;width:36px}.mobile-drawer nav{display:grid;gap:3px}.mobile-drawer .chapter-link{padding:8px 12px}.mobile-drawer .author-card{margin-top:auto}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}